Welcome to Our Community

Some features disabled for guests. Register Today.

OX AI

Discussion in 'CNC Mills/Routers' started by Robert Hummel, Feb 3, 2014.

  1. Aleksandar

    Aleksandar Journeyman
    Builder

    Joined:
    Feb 9, 2014
    Messages:
    34
    Likes Received:
    19
    Very nice. I like it more in alu.
    What will be overall size and cutting area.
     
  2. Robert Hummel

    Robert Hummel Custom Builder
    Staff Member Moderator Builder

    Joined:
    Nov 14, 2013
    Messages:
    978
    Likes Received:
    699
    I'm going for 900mm x 1200mm
    Was going to go 1500mm but it would take up to much room in my already cramped basement shop :)
     
  3. SRHaugen

    SRHaugen Well-Known
    Builder

    Joined:
    Feb 17, 2014
    Messages:
    3
    Likes Received:
    2
    Nice plates :) What thickness is it on the aluminum you use and what kind of aluminum alloy is it?
     
  4. Robert Hummel

    Robert Hummel Custom Builder
    Staff Member Moderator Builder

    Joined:
    Nov 14, 2013
    Messages:
    978
    Likes Received:
    699
    Ty!
    It's turning out better then I expected
    It is 1/4" econo plate 6061 :)
     
  5. Robert Hummel

    Robert Hummel Custom Builder
    Staff Member Moderator Builder

    Joined:
    Nov 14, 2013
    Messages:
    978
    Likes Received:
    699
    I had to make an adjustment in the slots for the motor mounts as a few, found them to be to tight of a fit, the updated files are now uploaded along with my end plates for the table.
    The aluminum is 1/4" thick and 30mm bolts are needed for the wheels
     
  6. Mark Carew

    Mark Carew OpenBuilds Team
    Staff Member Moderator Resident Builder Project Maker Builder

    Joined:
    Jun 28, 2013
    Messages:
    2,338
    Likes Received:
    1,771
    Ok I got my plates in about 10 min ago and WOW! Robert does an awesome job on these bad-boys they look fantastic!:thumbsup: Thank you Robert.
    I think my first aluminum cut will be the new name plate you made for joining the front extrusions!
    [​IMG]
     
    Robert Hummel likes this.
  7. Robert Hummel

    Robert Hummel Custom Builder
    Staff Member Moderator Builder

    Joined:
    Nov 14, 2013
    Messages:
    978
    Likes Received:
    699
    I will post the file ASAP my friend :)
     
    Mark Carew likes this.
  8. Mark Carew

    Mark Carew OpenBuilds Team
    Staff Member Moderator Resident Builder Project Maker Builder

    Joined:
    Jun 28, 2013
    Messages:
    2,338
    Likes Received:
    1,771
    Thanks Robert! Your OX AI is going to be a beautiful machine for sure
     
  9. Robert Hummel

    Robert Hummel Custom Builder
    Staff Member Moderator Builder

    Joined:
    Nov 14, 2013
    Messages:
    978
    Likes Received:
    699
    Ty bud!
    File is in build log :)
    Be sure to check the feed rate and plunge as I have been playing with my mill to get things dialed in.
     
  10. Mark Carew

    Mark Carew OpenBuilds Team
    Staff Member Moderator Resident Builder Project Maker Builder

    Joined:
    Jun 28, 2013
    Messages:
    2,338
    Likes Received:
    1,771
    Cool beans bro thank you!
     
  11. Derwin Palacpac

    Derwin Palacpac Well-Known
    Builder

    Joined:
    Jan 22, 2014
    Messages:
    14
    Likes Received:
    5
    :):D:thumbsup:I finally got my 1/4" 6061 aluminum parts made.. I took the files to a friend with a water jet table, modified the files to eliminate the "OX" logo because the machine only does "thru" cuts. Then threw the cut parts into a tumbler to smooth out the edges...
     
    Mark Carew likes this.
  12. Derwin Palacpac

    Derwin Palacpac Well-Known
    Builder

    Joined:
    Jan 22, 2014
    Messages:
    14
    Likes Received:
    5
    This is the finished parts. Still a ways to go before the OX comes alive! image.jpg
     
    Robert Hummel likes this.
  13. Robert Hummel

    Robert Hummel Custom Builder
    Staff Member Moderator Builder

    Joined:
    Nov 14, 2013
    Messages:
    978
    Likes Received:
    699
    Wow not bad for water vs metal lol
    Tumbler? That thing must be big, have you test fit eccentrics ?
    I was goin to bead blast mine but was worried it would oversize the holes
     
  14. Derwin Palacpac

    Derwin Palacpac Well-Known
    Builder

    Joined:
    Jan 22, 2014
    Messages:
    14
    Likes Received:
    5
    No i havent tested the eccentrics. I will be ordering most of my parts this friday. Is there something other than just a hole there? Yea, the last part of the video shows the parts in a tumbler of stones.. The stones can be changed out depending on how coarse or smooth of a finish you want.lol looks like a big shaky tub...
     
  15. Mark Carew

    Mark Carew OpenBuilds Team
    Staff Member Moderator Resident Builder Project Maker Builder

    Joined:
    Jun 28, 2013
    Messages:
    2,338
    Likes Received:
    1,771
    Way to go @Derwin Palacpac! Loved watching the water jet video of plates being cut. :thumbsup: Its crazy to see the OX being cut on that machine. I think a lot of guys may want to get your buddy to make them plates as well :D
    Keep up the good work looking forward to your build.
     
    Pawlenko M likes this.
  16. asb_79

    asb_79 Veteran
    Builder

    Joined:
    Feb 19, 2014
    Messages:
    78
    Likes Received:
    30
    I couldn't find an economic source for fibreglass sheet in Australia let alone knowing where I could get it NC cut. So, I too opted to make a set of Aluminium Waterjet cut Gantry parts. I also drew up some corner brackets and had them cut them cut with the plates. For me this worked out an economical method to get these parts, especially since I got the corners as well. The operations manager at the Waterjet company even gave me a discount when I told him what I was building and he was actually quite keen to potentially add one of these machines to his workshop after he sees mine.
     

    Attached Files:

    Mark Carew and Robert Hummel like this.
  17. Robert Hummel

    Robert Hummel Custom Builder
    Staff Member Moderator Builder

    Joined:
    Nov 14, 2013
    Messages:
    978
    Likes Received:
    699
    I popped by my friends metal shop and picked up some more off cuts and he gave me a sample bottle of this :)
    image.jpg
    He said to give it a try and that he was sure id like it, will see :)
     
  18. The Dude

    The Dude Veteran
    Builder

    Joined:
    Jan 2, 2014
    Messages:
    243
    Likes Received:
    99
    It's probably vegetable oil <snicker>
     
  19. Mark Carew

    Mark Carew OpenBuilds Team
    Staff Member Moderator Resident Builder Project Maker Builder

    Joined:
    Jun 28, 2013
    Messages:
    2,338
    Likes Received:
    1,771
  20. Robert Hummel

    Robert Hummel Custom Builder
    Staff Member Moderator Builder

    Joined:
    Nov 14, 2013
    Messages:
    978
    Likes Received:
    699
    Lol it would not supersize me, haha
    Hmmm and it's local, I bet the place I get my end mills carry it.
    I will check it out ;)
     
    Mark Carew likes this.
  21. SlyClockWerkz

    SlyClockWerkz Veteran
    Builder

    Joined:
    Feb 26, 2014
    Messages:
    94
    Likes Received:
    34
    Hey guys, I'm looking into getting some plates cut from steel or aluminum at a local shop around here, laser/waterjet. Whichever I get the best price on. I was getting the files ready, to send off for a quote. Robert, I was going to use your files, but when I push them over to a dxf format for autocad the scale gets wacked out. For some reason, when I try to scale it back to correct proportions, based on the sketch up measurements, autocad seems to refuse to get it exactly the same.

    Any Idea why Sketchup isn't exporting it accurately?
    On a side note, in the waterjet thread he posted a dxf, which is in mm, spot on with the model...
     
  22. asb_79

    asb_79 Veteran
    Builder

    Joined:
    Feb 19, 2014
    Messages:
    78
    Likes Received:
    30
    Hi SlyClockWerkz, the DXF I posted is identical to the one posted in the files tab of the Ox build thread. The only change I made was to erase the OX logo and add the corner brackets. I drew the corner brackets manually.

    Also, it may work fine but I would steer away from Steel due to weight. Based on material densities and assuming same thickness, the Al plates would be about 1.5 heavier than G10 (Garolite?) plates, steel plates would be nearly 4.5 times heavier than G10 and 3 times heavier than Aluminium. The Gantry plates in Aluminium weight ~1.6-1.7kg. My feeling is you would want to keep the Gantry light as possible to reduce stress on the motors and belt.

    Cheers
    Anthony
     
  23. SlyClockWerkz

    SlyClockWerkz Veteran
    Builder

    Joined:
    Feb 26, 2014
    Messages:
    94
    Likes Received:
    34
    What if the steel plate was 1/8" and or had webbing cutout (think trusses) in the un used areas? The design isn't dependent on the plate thickness if I recall, except you may have alittle extra screw sticking out.

    Just trying to think of all the possibilities.
     
  24. asb_79

    asb_79 Veteran
    Builder

    Joined:
    Feb 19, 2014
    Messages:
    78
    Likes Received:
    30
    I haven't done the sums but a thin steel plate may deflect more under cutting load than a thicker G10/Aluminium section.

    I'll pull out the old textbooks tonight and do some comparative deflection calcs.
     
  25. SlyClockWerkz

    SlyClockWerkz Veteran
    Builder

    Joined:
    Feb 26, 2014
    Messages:
    94
    Likes Received:
    34
    Would be much appreciated. If you are feeling energetic, maybe list the gist of how you go about calculations? Thanks!

    Edit, the eccentric nuts may not work though unless shaved down
     
    #55 SlyClockWerkz, Mar 2, 2014
    Last edited: Mar 2, 2014
  26. Robert Hummel

    Robert Hummel Custom Builder
    Staff Member Moderator Builder

    Joined:
    Nov 14, 2013
    Messages:
    978
    Likes Received:
    699
    That may be the issue as my plates are in standard, little
    Try opening my files byopening sketchup in inches rather then mm then export

    I imported kram242s files and then made my adjustment and personal touches.
    I use sketchucam in inches and that is how the files are saved.
    Hope this helps
     
  27. SlyClockWerkz

    SlyClockWerkz Veteran
    Builder

    Joined:
    Feb 26, 2014
    Messages:
    94
    Likes Received:
    34
    I ended up using ASB's dxf, and used a few of your little touches. Where the only changes you made the openbuilds logo? Did you change any critical dimensions, such as the v wheel spacing/diameter?

    Thanks!
     
  28. asb_79

    asb_79 Veteran
    Builder

    Joined:
    Feb 19, 2014
    Messages:
    78
    Likes Received:
    30
    I found an online calculator here, http://www.engineeringtoolbox.com/cantilever-beams-d_1848.html.

    Ran some numbers to get some generic deflection results for different materials and thickness. It is not an accurate representation of what would actually occur on the OX Gantry.

    For this comparison I've assumed a catilevered plate 180(width) x 200(high) and 3 & 6mm (thickness)

    Variables;
    Load (F) - Assumed 100N (10kg)
    Length of Beam (a) - 200
    (b) = zero, assumes load is at end
    Moment of Intertia (I) @3mm thickness I=405mm^4; @6mm thickness I=3240mm^4
    Mod of elasticity (E) (N/mm^2); G10 = 18600, Aluminium = 72000, Steel = 200000

    Summary;

    Deflection @3mm thickness
    G10 = 35.4mm
    Aluminium = 9.1mm
    Steel = 3.3mm

    Deflection @6mm thickness
    G10 = 4.4mm
    Aluminium = 1.1mm
    Steel = 0.4mm

    So, based on this, I suppose a 3mm steel plate wouldn't be any worse than the fibreglass one at 6mm, Although it would still be a bit heavier.

    You could probably use the eccentrics from inventables, they have a short shoulder.
     
  29. SlyClockWerkz

    SlyClockWerkz Veteran
    Builder

    Joined:
    Feb 26, 2014
    Messages:
    94
    Likes Received:
    34
    So basically, 3mm steel has slightly more deflection than a 6mm aluminum plate, and would perform slightly better than 6mm g10(garolite). A definite option/route to go down depending on cost to make.
    For the eccentrics, I could always just use a spacer to mimic a 6mm width.
    Either way, I'll see what the laser/water jet guys have to tell me.

    Thanks guys!
     
  30. Rick 2.0

    Rick 2.0 OpenBuilds Team
    Staff Member Moderator Resident Builder Builder

    Joined:
    Dec 20, 2013
    Messages:
    2,071
    Likes Received:
    955
    3.3mm deflection of the 3mm steel is 3 times the 1.1mm of 6mm aluminum. To match the 1.1mm deflection, you'd need 4.26 mm (0.168") steel which is fairly close to 8 gauge plate.
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice